Pump



Maud-112, 194a. ANTR A 2,193,504

PUMP

Filed May 21, 193? I 5 Sheets-Sheet 1 A TTORNEYS.

March 12, 1940. c. H. ANTRIM El AL.

PUMP

Filed May 21, 1955'? 5 Sheets-Sheet 2 INVENTORS. Elli-Z!- i m Mines sMarch c. H. ANTRlM El AL 2,193,504

PUMP

Filed May 21, 1937 5 Sheets-Sheet 5 NVEN S.

A TTORNEYS.

March 12, 1940.

, C. H. ANTRIM El AL PUMP Filed May 21, 1937 5 Sheets-Sheet 4 IN VENTORS. .Hntrim Zicsda Zc ATTORNEYS.

WITNESSES: k n ffg March 12, 1940.- TRM AL 2,193,504

PUMP Filed May 21, 1957 s Sheets-Sheet 5 INVENTORS. Charles E flzziriznCl 1161111 sd 1 mi'tzess: v BY 6 a e A TTORNEYS.

Patented Mar. 12, 1940 UNITED STATES PUMP Charles H. Antrim and Clyde H.Teesdale, Grand Rapids, Mich., assignors to Teesdale ManufacturingCompany, Grand Rapids, Mich., a corporation of Michigan Application May21, 1937, Serial No. 143,906

9 Claims.

The present invention relates to pumps and more particularly to gearpumps.

The primary objects of the instant invention are toprovide a pump of thetype above indicated which is particularly well adapted for feeding oilfrom a storage tank to the nozzle of an oil burner of an oil burningfurnace; to provide such a pump which is suitable for use in conjunctionwith a storage tank having either a single gravity supply conduit to thefurnace or a non-gravity supply conduit to the furnace and a dischargereturn conduit for returning oil pumped in excess of that required bythe burner; to provide such a pump having a diaphragm element associatedwith the suction conduit for eliminating pulsation hum; to provide sucha pump whose gear teeth are disposed within laterally disposedmarginally overlapping bores of a plate disposed interjacent spaced headplates; to provide such a pump whose pumping mechanism isimmersed in thepumped fluid and is thus self-lubricating; to provide such a pump havingan improved regulating valve by means of which the amount of oilsupplied to the furnace is uniform but whose quantity may be adjusted tovarying requirement; and, to provide such a pump which is economical inmanufacture, highly eflicent in use, and convenient with respect toreplacement of worn or defective parts.

An illustrative embodiment of the invention is shown in the accompanyingdrawings, wherein:

Figure 1 is a front elevational view of a hot air furnace equipped witha motor drivenfuel oil burner whose pump draws oil from a fuel oilsupply tank through a non-gravity supply conduit and returns oil inexcess of burner requirements to the tank through a discharge returnconduit;

Figure 2 is an enlarged sectional view of the pump unit per se;

Figure 3 is a sectional view on line 3-3 of Figure 2;

Figure 4 is a sectional view on line 4-4 of Figure 3;

Figure 5 is a sectional view on line 8-5 of Figure 3;

Figure 6 is a sectional view on line 8-8 02 Figure 3;

Figure 7 is a sectional view online 1-1 of Figure 2;

Figure 8 is a sectional view on line 8-8 of Figure '7;

Figure 9 is a sectional view on line 9-9 of Figure 8;

Figure 10 is a diagrammatic view similar to Figure 1 but showing aportion of the pump shown;

in Figure 2 when the same has been modified for use in conjunction witha single gravity feed conduit connected with fuel oil supply tank;

Figure 11 is a plan view on line I ll I of Figure 2 and showing thediaphragm covered well which eliminates the otherwise audibility ofpulsation pump beats;

Figure 12 is a perspective view of some of the several parts of the pumpprior to their assembly;

Figure 13 is a fragmentary sectional view of the valve mechanism in oneof its operating positions; and

Figure 14 is a fragmentary sectional view of the valve mechanism inanother of its operating positions. I

Referring then to the drawings wherein like parts of the pump (and theenvironment in which it is here shown in association) are designated bythe same numerals in the several views, a furnace I0, here shown as ofthe hot air type, has a conventional fuel oil burner ll mounted on thefloor 1 l2 and having its nozzle, not shown, projecting through the ashpit door I3 of the furnace. An electric motor l4, diagrammatically shownin Figure l, for operating the burner atomizer and the pump I5, throughthe flexibly and detachably coupled shafts l6, I6 is disposed betweenthe burner II and the pump 15.

Fuel oil supplied to the storage tank H (in Figure 1, buried outside thebuilding 18 in the ground l9, through the supply conduit 20), is causedto be pumped by the pump l5 from the tank I'I through the intake conduit2| past the ball check valve 22 and into the core conduit 23 of thecylindrical pump housing 24, through the core conduit 25 of the endplate 26 and its inside screen 21 into the liquid vacuum intake chamber28 within the pump housing 24, all as best shown by arrows in Figures 1and 2. The end plate 28 secured to one end of the cylindrical pumphousing 24 as by machine screws 28 thus seals one end thereof and itsopposite end is sealed by the end plate 30 of the motor l4 as by machinescrews 3|.

The end plate 30 is provided with a shaft bearing 32 for the shaft l8and an internal annular flanged web 33 here shown as integrally formedwith the cylindrical pump housing 24, dividing the pump housing into theliquid intake chamber 28 and an excess low pressure liquid chamber 34 islikewise provided with a shaft bearing 35 for the shaft l6 permittingdetachment of the flexibly coupled shafts l6, l6 when it is desired toreplace the pump unit by removal of the end plate 26. v

The pump 15 here shown as of the gear type,

whose several parts in their unassembled relation are best shown inFigure 12, comprises a pair of spaced head plates 36, 31. A medial plate38 disposed interjacent these head plates is provided with a pair oflaterally spaced marginally .overlapping gear retaining bores 39, 40within which are seated the driving gear 4| keyed to the shaft I6 andthe driven gear 42 keyed to a driven shaft 43. The opposite faces of thedriving and driven gears are here shown as flush with the oppositeinside surfaces of each head plate: 36, 31 which head plates and themedial plate 38 are secured together in assembled relation as by themachine screw 44.

The head plate 36 is provided with an external annular flange 45 andwith a liquid intake port 46, best shown in Figures 8 and 12, afiordingcommunication between the liquid intake chamber 28 and the gears 9|, 42.The head plate 31 is provided with a liquid discharge port41 incommunication with the annular channel 48 communicating with the coreconduit 49 leading to the cylindrical valve housing 50 disposed withinthe excess liquid chamber 34.

The web 33 is provided with a laterally disposed annular flange 5|forming a well 52 and the pump I5 in its assembled relation is seatedand secured therein by machine screws 53 passing through the externalannular flange 45 of the head plate 36 and into the flanged wall 5|]forming the well 52.

Referring now to Figures 3, 4, 5, 6, 13 and 14, the cylindrical valvehousing 50 is there shown as an integral portion of the pump housing 24and a quill 54, whose lower end is sealed by a cap 55 in any suitablemanner as by machine screws 56, is disposed within the valve housing 50within which it is detachably secured by a cap 51, provided with a screwthreaded plug 58, as by machine screws 59 pasing through the flange 60and into the wall of the housing.

The lower end of this quill is provided with an external annular flute6| in registration with the core conduit 49 and a transverse bore 62 inregistration with the flute 6| provides communication with the interiorof the quill. A pair of spaced external annular flutes 63, 64 disposedabove the flute 61 respectively register with a pair of spaced internalannular grooves 65, 66 and transverse bores 61, 68 respectively providecommunication between the external flute 63 and internal groove 65 andbetween the external flute 64 and the internal groove 66.

The external flute 63 registers with the elbow core conduit 69communicating with a flexible discharge conduit 10 leading fZTthe burnerII and the external flute 64 registers with the core conduit 1I whoseoriflce 12 communicates with the interior of the excess liquid chamber34.

A piston 13 disposed within the quill 54 has an annular external groove14 forming a pair of spaced heads 15, 16 and a reduced lower end 11. Alongitudinal bore 18 in this piston communicates with a transverse bore19 thereof communicating with the annular external groove--14. The upperend of the quill 54 is internally screw threaded to receive the screwthreaded cap 8| and a coiled expansion spring 82 disposed between theupper end of the piston 13 and the cap 8I normally maintains the pistonin its position shown in Figure '3.

In instances wherein the oil is drawn from the supply tank I1 through anon-gravity supply conduit 2| and oil in excess of burner requirementsis returned to the tank I1 through a disaieaece charge return conduit 80as shown in Figure 1, a threaded plug 83 is inserted into the threadedbore between the core conduit 23 and the parallel core conduit 84communicating with the excess liquid chamber 34, all as best shown inFigure 2. In instances wherein the oil is fed from the tank I1 to theintake chamber 28 of the pump through the single gravity feed line 65 asshown in Figure 10, the plug 83 is removed and a screw threaded plug 86is inserted into the threaded bore in which instance excess oil isreturned from the excess liquid chamber 34 to the intake chamber 28through the core conduits 84, 23 as indicated by arrows.

Otherwise audible pulsation pump beats may be eliminated by trapping apocket of air in a well covered by a diaphragm operable by the pumpbeats in the intake port or conduit to the pump and as shown in Figures2 and 11, the well 81 in the end plate 26 is covered by a diaphragm 88secured over its open end by a ring 89 clamping the diaphragm to theannular flanged wall 90 forming the well 81.

Leakage of oil from the excess low presure liquid chamber 34 between theshaft I6 and its bearing 32 in the end plate 30 is prevented by asealing element comprising a disc member having an apertured metal hubportion I embracing the inner end of the shaft I6 and its flexibleportion I 0I extending radially therefrom. The oposite marginal bordersof the flexible portion IOI of the disc are provided with gaskets I02,I03 and an apertured cupped cap I04, embracing the shaft I6 inwardly ofthe disc memberbetween which members is provided a coiled expansionspring I05, engages the gasket I03 for securing the marginal edge of theflexible portion IOI of the disc to the end plate 30 as by screws I06.

Operation In operation, fuel oil within the supply tank I1 is drawntherefrom through the intake conduit 2I (Figure 1) or the intake conduit85 (Figure 10) in the direction indicated by arrows, through the ballcheck valve 22, thence through the core conduits 23, 25, past the screen21 and into the vacuum liquid intake chamber 28 which provides anauxiliary oil supply and within which the pump I is immersed.

Oil within the chamebr 28 is drawn through the intake or suction port 46of the head plate 36 of the pump and discharged therefrom through thedischarge port 41 of the plate 31, said suction being effected byrotation of the driving gear 4| and its driven gear 42 in the directionindicated by the arrows in Figure 8.

These gears are seated in the laterally spaced marginally overlappinggear retaining bores 39, 40 of the medial plate 38 and since theopposite faces of each gear are flush with the opposite inner surfacesof the head plates 36, 31, oil leakage occurs between the rotating gearteeth and between the opposite surfaces of this medial plate andadjacent inner surfaces of each head plate to lubricate the shaftbearings of the driving shaft I6 and driven shaft 43.

Oil thus discharged through the discharge port 41 passes into theannular groove 48 from where it flows into the core conduit 49, thenceinto the annular groove 6I of the quill 54 and through the bore 62thereof into its interior.

Pressure of the pumped oil lifts the piston. 13 against the action ofthe expansion spring 82 from the position of the piston shown in Figureto its position shown in Figure 13 permitting flow of the oil upwardlybetween the inner wall of the quill and the outer wall of the lower endof the piston, into the annular flute 65 from where it flows through thetransverse bore 61 into the elbow core conduit 69 and thence outwardlythrough the discharge conduit 10 to the nozzle of the burner l l.

Oil pumped in excess of the quantity required by the burner causes thepiston to move upwardly against the action of the expansion spring 82from its position shown in Figure 13 to its position shown in Figure 14permitting flow of the oil through both the bore 61 into the dischargeconduit 10 and also upwardly through the hollow piston 13, outwardlythrough its port 19 and into the bore 68, thence into the conduit IIfrom whose orifice 72 the oil flows into the excess low pressure liquidchamber 34.

In instances wherein the oil is drawn fromthe supply tank I! through thenon-gravity supply conduit 2| and oil in excess of burner requirementsis returned to the tank I! through the discharge return conduit 80 asshown in Figure 1, a threaded plug 83 is inserted into the threaded borebetween the core conduit 23 and the parallel core conduit 84communicating with the excess low pressure liquid chamber 34, allas,best shown in Figure 2.

In instances wherein the oil is fed from the tank I! to the intakechamber 28 of the pump through the single gravity feed line 85 as shownin Figure 10, the plug 83 is removed and a screw threaded plug 86 ininserted into the threaded bore in which instance excess oil is returnedfrom the excess liquid chamber 34 to the intake chamber 28 through thecore conduits 84, 23 as indicated by arrows.

here shown as eliminated byprovision of the well 81 in the end plate 26whose open end is covered by the diaphragm 88 secured by the ring. 89

conduit to the furnace and a discharge return line is provided forreturning oil pumped in excess of that required by the burner.

The pump is constantly immersed within the L liquid providingself-lubrication and otherwise audible "pulsation hum is eliminated bynovel means. The unit herein shown and described is economical inmanufacture, highly eflicient in use and is obviously convenient withrespect to replacement of worn or defective parts and since the chamber28 is a vacuum chamber and since the chamber 34 is a low pressurechamber sealing of unit is not difficult in production.

While but one specific embodiment of the invention has been herein shownand described, it will be understood that certain details of theconstruction shown may be altered or omitted without departing from thespirit of this invention as the same is defined by the following claims.

We claim:

1. A unit comprising a sealedhousing having its interior divided into aliquid intake chamber provided with a liquid intake port and an excessliquid chamber provided with a liquid discharge port, a valved housingwithin the excess liquid chamber having a discharge port for deliveringa predetermined quantity of liquid and a by-pass port communicating withthe excess liquid chamber for delivering liquid pumped in excess of saidpredetermined quantity, and a pump within the liquid intake chamberprovided with 'a liquid intake port and having a liquid discharge portcommunicating with the valved housing.

2. A unit comprising a sealed housing having a division wall dividing itinto a liquid intake chamber provided with a liquid intake port and anoncommunicating excess liquid chamber provided with a liquid dischargeport, a valved housing within the excess liquid chamber having adischarge port for delivering a predetermined quantity of liquid and aby-pass port communicating with the excess liquid chamber for deliveringliquid pumped in excess of said predetermined quantity, and a pumpwithin the liquid intake chamber provided with a liquid intake port andhaving a liquid discharge port communicating with the valved housing. 7

3. A unit comprising a sealed housing having a partition wall dividingit into a liquid intake chamber provided with a liquid intake port andan excess liquid chamber provided with a liquid discharge port, a valvedhousing within the excess liquid chamber'having a discharge port fordelivering a predetermined quantity of liquid and a by-pass portcommunicating with the excess liquid chamber for delivering liquidpumpedin excess of said predetermined quantity, and a pump mounted as aunit within the liquid intake chamber on said partition wall comprisinga pair of spaced head plates, a medial plate disposed interjacent thehead plates provided with a pair of laterally spaced marginallyoverlapping gear retaining bores, a driving gear disposed within onebore and'a driven'gear in mesh with the driving Hgear disposed withinthe otherboreglone of said clamping it to the annular flanged wall 98which head plates having a liquid intake port and the other head platebeing provided with a liquid discharge port communicating with thevalved housing. e f

4. A structure comprising a housing divided by a partition wall into aliquid intake chamber and an excess liquid chamber and having a fluidintake port, a fluid discharge port, and an excess fluid discharge port;a quill disposed within the excess liquid chamber and having a fluidintake port extending throu h the wall of the quill and in registrationwith he intake port of the housing, a pump located within the liquidintake chamber for causing a flow of fluid under pressure to said quill,a fluid discharge port extending through the wall of the quill and inregistration with the discharge port of the housing, and an excess fluiddischarge port extending through the wall of the quill and inregistration with the excess discharge port of the'housing; and a pistonslidably mounted within the quill normally sealing the discharge portand excess discharge port but movable under pressure of pumped fluidcharge port, a valve housing within the excess fluid chamber having afluid intake port, a fluid discharge port, and an excess fluid dischargeport communicating with the excess fluid chamber; a quill disposedwithin the valve housing having a fluid intake port extending throughthe wall of the quill and in registration with the intake port of thevalve housing, a fluid discharge port extending through the wall of thequill and in registration with the discharge port of the valve housing,and an excess fluid discharge port extending through the 'wall of thequill and in registration with the excess discharge port of the valvehousing; a pump Within the fluid intake chamber provided with a fluidintake port and having a fluid discharge port communicating with theintake port of the valve housing; and a'piston slidably disposed withinthe quill normally sealing the discharge port and excess dismeans fordividing it into a vacuum liquid inmar port but movable under pressureof pumped fluid through the intake port of the quill to provide apredetermined flow of fluid through the discharge port of the quill andto thereafter cause the flow of fluid through the excess discharge portof the quill pumped in excess of said predetermined flow.

6.A unit comprising a sealed housing having take chamber provided with aliquid intake port and an excess low pressure liquid chamber providedwith a liquid discharge port, a valved housing within the excess liquidchamber having a discharge port for delivering a predetermined quantityof liquid and a by-pass port communicating with the excess liquidchamber for delivering liquid pumped in excess of said predeterminedquantity, and a pump within the liquid intake chamber supported by saiddividing means and provided with a liquid intake port communicating withsaid intake chamber and having a liquid discharge port communicatingwith the valved housing.

7. A unit comprising a sealed housing having a partition dividing thehousing into a vacuum fluid intake chamber provided with a fluid intakeport and an excess low pressure fluid chamber provided with a fluiddischarge port, a valve housing within the excess fluid chamber having afluid intake port communicating with said fluid intake chamber, a fluiddischarge port, and an excess fluid discharge port communicating withthe excess fluid chamber; a quill disposed within the valve housinghaving a fluid intake port extending through the wall of the quill andin registration with the intake port of the valve housing, a fluiddischarge port extending through the wall of the quill and inregistration with the discharge port of the valve housing, and an excessfluid discharge port extending through the wall of the quill and inregistration with the excess areasos discharge port of the valvehousing; a pump mounted within the fluid intake chamber upon saidpartition and provided with a fluid intake port and having a fluiddischarge port communicating with the intake port of the valve housing;and a piston slidably disposed within the quill normally sealing thedischarge port through the wall of the quill and excess discharge portthrough the wall of the quill but movable under pressure of pumped fluidthrough the intake port of the quill to provide a predetermined flow offluid through the discharge port of the quill and to thereafter causethe flow of fluid through the excess discharge port of the quill pumpedin excess of said predetermined flow.

8. A unit comprising a sealed housing having a partition dividing itinto a liquid intake chamber and an excess liquid chamber and having anannular flange forming a well in the liquid intake chamber, said housingbeing provided with a liquid intake port and a liquid discharge port, avalved housing located within the excess liquid chamber and formedintegral-with one of the walls of the sealed housing and having aby-pass communicating with the excess liquid chamber, and a pump mountedas a unit within said well and removable therefrom as a unit and havingmeans for detachably securing it to said annular flange.

9. A unit comprising a sealed housing having a partition dividing itinto a liquid intake chamher and an excess liquid chamber and having anannular flange forming a well in the liquid intake chamber, said housingbeing provided with a liquid intake port and a liquid discharge port, avalved housing located within the excess liquid chamber and formedintegral with one of the walls of the sealed housing and having aby-pass communicating with the excess liquid chamber, and a pump mountedas a unit within said well and removable therefrom as a unit andcomprising inner and outer head plates, a medial plate disposedinterlacent the head plates and provided with a pair of laterally spacedmarginally overlapping gear retaining bores, a driving gear disposedwithin one bore, a driven gear disposed within the other bore in meshwith the driving gear, said gears having their faces substantially flushwith the faces of the medial plate, one of said head plates having aliquid intake port and the other head plate being provided with a liquiddischarge port, fastening means for securing said plates together forenabling the pump to be placed in and removed from said well as a unit,and separate fastening means for securing the outer head plate to theannular flange.

CLYDE H. 'I'EESDALE. CHARLES H. AN'TRIM.

